Improvement in balancing and ventilating mill-stones



S. N. PAGE.

Balancing and Ventilating Milistones.

Patented July 7, 1863.

mam

N. PETERs, mlo-umo n rwr, Wampum D. C"

UNITED STATES ATENI OFFICE.

SAMUEL N. PAGE, OF SALONA, PENNSYLVANIA.

IMPROVEMENT IN BALANCING AND VENTILATING MILL-STONES.

Specification forming part of Letters Patent No. 39,167, dated July 7, 1863.

To aZZ whom it may concern:

Be it known that I, SAMUEL N. PAGE, of

' Salona, in the county of Clinton and State of Pennsylvania, have invented a new and Improved Mode of Balancing and Ventilating Millstones; and I do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the accompanying drawings, making part of this specification, in which- Figure 1 is a sectional elevation of the curb, runner-stone, and a portion of lower or bedstone, the section being taken in the line .90 a: of Fig. 2. Fig. 2 is a top view or plan of the same. Fig. 3 is a side elevation of the runner stone. Fig. 4 is a plan of the same. Fig. 5 is a sectional elevation of the curb, the section being taken in the line y y of Fig. 2.

Similar letters of reference indicate corresponding parts in the several figures.

The nature of this invention consists in providing the runner-stone with a number of weights capable of being adjusted so as to balance the stone, and thereby cause its face as it rotates to preserve its parallelism with .the face of the bed-stone.

It also consists in a novel device for ventilating the run. of stone, all as will be hereinafter fully explained.

To enable others skilled in the art to which my invention appertains to fully understand and use the same, I will proceed to describe its construction and operation.

In Figs. 1, 2, and 5 of the accompanying drawings, A represents the upper and runner stone, having secured within its central aperture or eye, B, a rynd, a, which rests upon the apex of the spindle O in the usual manner.

D is the driver or crossbar, by which the motion of the spindle is communicated to the runner, keyed or otherwise suitably attached to the upper part of the spindle.

The runner-stone is provided on its circumference with a number of radial flanges or wings, b, placed equidistant apart and extending from the bottom of the stone to near the top thereof. These wings support a circular concentric way, E, on which is placed a number of sliding weights, F, provided with set-screws, 0, whereby they are secured against spontaneous movement when adjusted so as to balance the stone.

The curb H, which covers the runner stone, besides the usual central aperture for the grain to pass through into the eye of the upper stone, has made in it, directly opposite to the annular space formed between the runnerstone and sides of the curb, an oblong rectangular opening, over which, and communicatin g with the external air, is a case or box, I. (Shown clearly in Figs. 1 and 5.) This box communicates with the external air through an opening, j, at the entrance of which, and extending a short distance into the box, is a convex plate, k, which acts as a fender to prevent any of the flour which gets between the runner-stone and curb from being thrown out through the opening j by the action of the blast of air created by the wings.

J is an inclined partition, attached at one edge only to the curb on the inner side, and extending upward a short distance into the box I. Y

The operation is as follows The bed or lower stone being set with its upper and grinding surface perfectly level, the upper stone is placed in position and balanced by adjusting the weights on the circular way to such points around the stone as may be necessary to effect the desired result-namely, to cause the face of the runner-stone as the stone rotates to preserve its parallelism with the face of the bed-stone. This being efl'ected, the curb and other parts are placed in position, when the mill is ready for grinding. As the upper stone rotates, the wings create an upper current of air, which carries the bran and flour which gets between the runner-stone and curb upon one side of the partition J into the case or box I. When striking against the top, and being a little moist from sweat, it adheres and balls until a quantity has accumulated, when it falls down on the opposite side of the partition into the annular space and is carried around by the wings until it is brought opposite to the opening into the discharge-spout, whence it escapes.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-- 1 The weights F, provided with set-screws 0, and fitted to slide on a circular way E, which is supported in a position concentric with the stone by flanges or wings 1), project ing from the circumference of the same, as The above specification of my improved and for the purpose specified. mode of balancing and. ventilating millstones g 2. The flanges 0r Wings b, projecting from signed this 8th day of April, 1863. the runner-stone, in combination with thein- SAMUEL N. PAGE. clined partition J box 1, fender 7c, and opening Witnesses: j, when constructed and arranged to operatcin R. N. MAYHEW, the manner and for the purpose specified." CHARLES SMITH. 

